Materials Literature
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Advantages of the use of silicon and porous silicon (PS) for the chemical production of hydrogen have been analyzed and compared with other fuels. An analytic expression is derived for the dependence of the volume of hydrogen produced at the PS interaction with water on the material porosity, as well as for the corres…
Infiltration-mediated SHS of β-Si6–z Al z O z N8–z –TiN/TiB2–BN composites was explored upon variation in applied nitrogen pressure, amount of combustible and inert components in green mixture, sample size, and BN content of resultant composites. Synthesized ceramics of different density and phase composition were cha…
Abstract Phases present in slags from Araxá (Brazil), Oka (Quebec) and Fen (Norway) resulting from the production of ferroniobium by the aluminothermic reduction of pyrochlore-group minerals are a function of composition of the pyrochlore feed and the diverse fluxes (CaO, CaF2) added to the alumina and iron oxide used…
This paper considers the simulation capability of nonuniform distributed-parameter circuit transients by using MatLab Simulink. This approach is capable of determining currents and voltages of nodes for power networks of any configurations and modes. The paper contains results of nonuniform line simulations in idle, s…
Abstract Starting from Nye’s tensor, alternative characteristics of crystal curvature indicative of dislocation content are considered subject to very low thickness of investigated matter under the free surface and discreteness of orientation sampling. Analysis within the framework of continuum mechanics, undertaken t…
The MnO x -CeO 2 / t -ZrO 2 catalyst was prepared by impregnation with nano t -ZrO 2 as the support. The influence of active component and reaction temperature on denitration performance of catalyst was investigated. The results showed that denitration efficiency improved as active component increased and reaction tem…
NaMgH 3 perovskite hydride and graphitic carbon nitride (g-C 3 N 4 ) powder with multi-layer structure have been synthesized by high-energy ball-milling and heating-decomposition method respectively. In comparison with pristine NaMgH 3 hydride, the as–milled NaMgH 3 +5wt.% g-C 3 N 4 (NMH-5CN) composite presents better…
The paper deals with the study of optical properties of graphene oxide (GO) by inkjet printing. Defined structure of GO can be obtained by reducing of prepared layers either by heating or by UV radiation (rGO). The dispersion function for refractive index and extinction coefficient of GO and both rGO thin films were m…
In this paper, polydopamine films were deposited on titanium surface by electropolymerization method. The change of surface potential for the pH effects on the amino and catechol groups was investigated. The experimental results showed that the interface resistance of polydopamine films increased with the increase in…
The application of 1/f noise measurements to speed up electromigration (EM) testing and provide a better understanding of the underlying mechanisms of electromigration in advanced microelectronics interconnects is investigated. It is shown that 1/f noise measurements can be used for early EM damage detection during EM…
Zinc lithium bismuth borate glasses containing Er 3+ in (25-x) The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption and fluorescence spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters (=2, 4, 6) are evaluated from the intensiti…
Abstract Reactivity of energy gypsum was investigated. The method is based on the conversion reaction of aqueous suspension of gypsum with ammonium carbonate solution. Rate of the conversion of all investigated samples, including gypsum originating from flue gas desulphurization (FGD), was high and 80 % conversion was…
Efforts to optimize the use of silicon rubber and epoxy resin as an insulating material in the electricity sector continues to be done where one of them is looking for filler are cheap and easily obtained. So in this paper is described about the use of coal fly ash as filler for silicone rubber and epoxy resin, where…
The intense heat and energetic particle fluxes expected in ITER and future magnetic fusion reactors pose prohibitive problems to the design, selection and maintenance of the first wall and divertor. Micropellet injection (MPI) technologies can offer some innovative solutions to the material and extreme heat challenges…
When investigating nickel (Ni) thin films deposited by using an oblique angle deposition (OAD) technique, we find a strong correlation between the structural, electrical, and optical properties. The microstructure of the Ni thin-films is largely influenced by the deposition angle of the OAD technique. By increasing th…
New photosensitive polymeric film composites based on oligomer containing ferrocenyl and carbazolyl fragments doped with symmetric polymethine dye are synthesized. Their photoelectric properties are investigated. Photovoltaic properties of these composites are detected. The mechanisms and peculiarities of the photovol…
<p>A Partial Discharge (PD) is an unwanted phenomenon in electrical equipment. Therefore it is of great importance to identify different types of PD and assess their severity. This paper investigates the acoustic emissions associated with Internal Discharge (ID) from different types of sources in the time-domain…
K ompleksin kristal yaps [Mg(H 2 O) 6 ](C 4 H 4 NO 4 S) 2 , 296 K'de tayin edildi. Molekler Kristal yapnn birim hcre parametreleri a=6
Ethylene propylene rubber insulation under operation for 16 years in boiling water reactor containments was subjected to additional thermal aging at 110°C. After 70 days of aging, the mechanical property of the insulation was decreased such that the limit guaranteeing durability against design-basis events was breache…
In the frame of the MetOp-SG MWS microwave radiometer, we determine the expected radiometric calibration bias caused by temperature gradients in the blackbody target. The target consists of a pyramidal array of metal pyramids coated with microwave absorber. The temperature gradients within the absorber layers are simu…